This textbook explains the concepts of biomedical electronics and instrumentation. The text is primarily aimed at students of electronic engineering, electronic instrumentation, electrical engineering, and biomedical engineering. It presents succinct coverage of the theory, definitions, formulae and examples. The text is supported by diagrams and worked out problems. To make the underlying concepts easily comprehensible, the text has been written in question-answer form. The sample questions have been taken from university examination papers.